Question

Given below are two statements:
Statement I: In a dicotyledonous leaf, the adaxial epidermis generally bears more stomata than the abaxial epidermis.
Statement II: In a dicotyledonous leaf, the adaxially placed palisade parenchyma is made up of elongated cells, which are arranged vertically and parallel to each other.
In the light of the above statements, choose the correct answer from the options given below:

• A. Statement I is true but Statement II is false
• B. Statement I is false but Statement II is true
• C. Both Statement I and Statement II are true
• D. Both Statement I and Statement II are false

Answer 1

The Correct Option is B

To determine the correct answer, let's analyze each statement based on our understanding of dicotyledonous leaf anatomy:

1. Statement I: In a dicotyledonous leaf, the adaxial epidermis generally bears more stomata than the abaxial epidermis.

In most dicotyledonous plants, the abaxial (lower) surface of the leaf usually has more stomata compared to the adaxial (upper) surface. This adaptation helps minimize water loss while allowing gas exchange. Therefore, Statement I is false, as it erroneously suggests a higher stomatal density on the adaxial surface.

2. Statement II: In a dicotyledonous leaf, the adaxially placed palisade parenchyma is made up of elongated cells, which are arranged vertically and parallel to each other.

The palisade parenchyma cells are indeed elongated, and they are arranged vertically and parallel to each other, which facilitates efficient photosynthesis by maximizing light absorption. Thus, Statement II is true.

Given the analysis, the correct answer is: Statement I is false but Statement II is true.